"Jimmy Kimmel Live" guests Kaitlyn Bristowe and Shawn Booth swear on July 27, 2015, on a stack of Us Weekly magazines, that they will still be together in a year. Photo Credit: ABC / Randy Holmes

"The Bachelorette" star Kaitlyn Bristowe and fiance Shawn Booth, who won her heart over runner-up Nick Viall on Monday's Season 11 finale, are confident enough they will still be together in a year that they agreed to a sizable bet on national TV.

"Twice a year for, like, 13 years now, we've seen people get together," comedian Jimmy Kimmel told the couple on his late-night ABC talk show Monday, "and then they come on the show and they seem to be very much in love . . . and then the next thing we know, we see them on the cover of a magazine with a tear down the center."

Joking that, "Quite frankly, my heart can't take it anymore," he had Bristowe, 30, and Booth, 29, recite a pledge and swear on a stack of Us Weekly magazines that they were in love and would be in a committed relationship on July 27, 2016, "because if we're not, this was a huge waste of everyone's time." The penalty was $1,000, payable to Kimmel in a lump sum or in monthly installments of $2.77 for 30 years.

The couple appeared Tuesday on "Good Morning America" and poked fun at Viall's having tossed away an engagement ring on camera after Bristowe rejected him.

"I thought it was funny," Bristowe said with a laugh. Booth agreed, and called it "a weak toss . . . I'd have done overhand." As Bristowe laughed again, Booth joked of Viall saying, "He would go underhand!"

Now that his and Bristowe's relationship has gone public, Booth said, "We just want to spend some time with our friends and family . . .go to my hometown, go to her hometown and kind of relax and then start figuring out the long-term plans."

"He's never been to Vancouver, I've never been to Nashville, so we're kind of going to do both and figure out where we want to be," Bristowe added. "I, for one, am not going to be upset with it [the final choice]."